If you are on a Linux system with the GNU Ada Compiler GNAT installed, it shouldbe enough to type make to build this program. If you want to use Docker, youmay either build this image with docker build . or run it directly with

docker run -it --rm masysma/uni-dke-u03-11-ra-interpreter

Otherwise, you will need to compile the program with any Ada 2012 compiler.The main file is ra_interpreter.adb.